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18 – English
A muffler fitted with a catalytic converter reduces the extent of
the following substances in the exhaust fumes:
• Hydrocarbons (HC). Some hydrocarbons in gasoline and the
exhaust are carcinogenic.
• Nitric oxides (NO). Irritating for the breathing air-ways.
• Aldehydes. The most common formaldehyde, is carcinogenic
and causes hypersensitiveness.
NOTE! The level of carbon monoxide is not reduced. This is an
odourless and extremely poisonous substance. Therefore avoid
exposure without good air circulation.
MAINTENANCE
Muffler with catalytic converter
The muffler is also designed to
dampen the noise level and to
direct the exhaust fumes away
from the user. The exhaust
fumes are hot and can contain
sparks, which can result in fire
if the exhaust fumes are
directed towards a dry or
inflammable material. Some
mufflers are fitted with a
special spark arrest screen. If
your machine is fitted with this
type of muffler then the screen
should be cleaned at least
once a week. This is done
using a wire brush. If the
screen is damaged in any
way it should be replaced. If
the screen is blocked this will
result in engine overheating
and damage to the cylinder
and piston.
NOTE!
Never use a machine with a
defective muffler.
WARNING!
The coating on/in the catalytic element can be
hazardous to health if consumed. Wear
gloves when carrying out service work on the
catalytic converter.
WARNING!
Mufflers fitted with catalytic converters
become extremely hot during use and after
stopping. This also applies at idling speeds.
Contact can result in burns to the skin. Be
observant to the risk of fire!
!
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Air filter
The air filter should be cleaned
regularly removing dust and
dirt to avoid:
• carburetor malfunction
• starting problems
• reduced engine power
• unnecessary wear to engine
parts
• abnormal fuel consumption
Clean the filter after every 25
hours or more regularly if
operating conditions are
exceptionally dusty.
Cleaning the air filter
Dismantle the air filter cover
and remove the air filter. Wash
in clean, warm soapy water.
Ensure that the filter is dry
before refitting. An air filter
used for a long period of time
can never be cleaned com-
pletely. Therefore it is neces-
sary to replace the filter from
time to time with a new filter. A
damaged air filter must always
be replaced.
Cooling system
To maintain as low operating
temperature as possible the
engine is equipped with a
cooling system.
The cooling system consists
of:
1. An air intake on the starter
unit.
2. Cooling fins on the
flywheel.
3. Cooling fins on the
cylinder
4. Cylinder cover (leads cold
air onto the cylinder).
Clean the cooling system using
a brush at least once a week,
in difficult conditions more
often.
A dirty or blocked cooling
system leads to the engine
overheating resulting in
damage to the cylinder and
piston.